Subject: Re: Booting sd0 (disk geometry versus bios geometry)
To: Todd Whitesel <toddpw@best.com>
From: Patrick Welche <prlw1@cam.ac.uk>
List: port-i386
Date: 07/10/1998 12:50:40
Todd Whitesel wrote:
> 
> > "Me too" in that with a new disk disklabeled with an offset of 0 a
> > particular (new) pc froze totally, yet when this disk was plugged into
> > an old 66MHz pentium, the latter booted fine. Re-disklabeling with an
> > offset of 63 allowed the new pc to boot, which I believe is what
> > sysinst does by default.
> 
> Not in my experience. sysinst (or perhaps disklabel, when it is writing
> bootstrap code) keeps wanting to blow away my DOS partition table and MBR.
> With 1.2 I was able to use Disk Manager to fix things, but with 1.3.2 I let
> it use the real disk geometry for NetBSD and it put that into the MBR, which
> totally confused all my DOS utilities. I had to boot my old 1.2 installation
> and use pfdisk to re-establish my usual DOS partitions. (Why didn't I have
> a bootable 1.3.2 system at that point? Long story, trust me.)
> 
> Only a couple files on my DOS C & D partitions got fluffed, according to
> scandisk. Fortunately they were not critical and I did not have to reinstall
> win95.

Ah sorry - what I was after was a completely NetBSD disk, that's why I
thought an offset of 0 would be alright, and should have been where it
not for the dodgy BIOS - I didn't expect and dos partitions to coexist
on there!


Cheers,

Patrick